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亭子口库区水质汞的污染特征及建库后水体中汞的预测 总被引:1,自引:1,他引:1
亭子口水利枢纽位于喜陵江平流苍溪县城以上,15km处。本文根据嘉陵江广元段水质监测资料,分析库区地面水体中汞的现状污染特征,并运用沉积物的负指数方程预测库区建坝后水体中汞的浓度。 相似文献
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嘉陵江南充段水质监测分析与综合评价 总被引:1,自引:0,他引:1
本文依据南充市2011年~2013年嘉陵江流域水环境监测统计资料,采用单因子评价法和综合污染指数法分析与综合评价嘉陵江南充段水质污染特征和现状。结果表明,研究河段内的清泉寺、小渡口和李渡断面总氮含量超标属于地表水Ⅳ类水体,超标倍数年均值分别0.21、0.35、0.37,其他监测项目符合Ⅲ类水质标准,均属于轻度污染。彩虹桥断面总氮、总磷、氨氮、CODMn和BOD5含量超过Ⅲ类标准,均在Ⅳ~Ⅴ类范围,属于中度污染。综合分析嘉陵江南充段,水质主要污染指标为总氮,综合污染指数为0.38,水质综合评价结果属轻度污染。该评价结果能为嘉陵江流域的水环境保护和科学治理提供依据。 相似文献
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《四川环境》2021,(3)
以南充市蓬安县为例,采用了单因子评价法、主要污染物水质标识指数法和主成分分析法统计分析了2017~2019年嘉陵江一级支流蓬安数据,综合分析嘉陵江一级支流县域河流水污染特征及水质评价。结果表明:(1)蓬安县域内嘉陵江一级支流水环境有机污染较为严重,污染物主要源于生活污水、工业污水、农业面源污染排放,高风险因子为CODCr和TP。(2)水质受水期影响大,变化特征为:枯水期丰水期平水期;上半年水质优于下半年,1~3月水质最差。(3)蓬安县域内嘉陵江支流年均值评价水质逐年改善,达标率逐年增加,污染程度依次为清溪河河舒河大泥溪长塘河金溪河。就蓬安县的水质评价结果进行问题剖析,为嘉陵江流域污染防治管理提供科学依据。 相似文献
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采用综合评价与分类评价相结合的方法,分析江安河水质特征,旨在发现影响河流水质的主要污染物和污染源,为江安河水污染防治争水责源利用提供科学依据.2011年10月对江安河全段水质进行了统一标准监测,监潮项目有氨氮、总磷、COD、浊度,共4个项目;2012年4月再一次对江安河全段进行监测,并增加测量其水体中几种重金属含量.总体上,上游和中游断面均属清洁水质,下游断面属污染水质.河流综合污染指数、营养盐类污染指数、重金属污染指数均沿流程顺序增高.主要污染物为化学需氧量、氮磷类污染物.上游多为农业灌溉区,中下游污染较为严重,其中生活源、工业源排放的污水是影响江安河水质的主要污染源. 相似文献
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新疆河流水质调查及评价 总被引:1,自引:0,他引:1
采用2001年水质监测结果,用单项指标法对新疆河流水质进行评价,对新疆河流水质污染状况依据污染物标准做出分析判断。探讨污染途径及污染原因,寻找地下水水质恶化的根源,加强河流点源与非点源污染治理,为改善新疆河流水质提供依据。 相似文献
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南充市嘉陵江干流高锰酸盐指数和氨氮动态变化及影响因素 总被引:1,自引:0,他引:1
《四川环境》2018,(6)
为更好地掌握南充市嘉陵江干流主要污染物质的情况,使用2011~2015年南充市嘉陵江干流3个主要断面的监测数据,采用Pearson相关性分析、单因子水质标识指数等方法进行分析和探讨了氨氮、高锰酸盐指数的动态趋势及引起变化的因素。结果显示:五年来,3个监测点的DO和p H达到Ⅲ类标准,且变化基本稳定。南充段嘉陵江干流沙溪站(入境断面)有机污染物质在逐年减少,进入南充境内清泉寺站(控制断面)受到了轻微的污染,出境断面烈面站的受轻度污染程度均高于其余两个断面。丰水期和平水期,高锰酸盐指数增大,而氨氮含量呈下降趋势;枯水期两项指标增减趋势相同。五年中3个自动监测站的高锰酸盐指数和氨氮监测数据均达到Ⅲ类水质标准内,其中沙溪监测点水质最好。2011~2015年南充段嘉陵江水质状况整体保持良好,但烈面(出境)的两项指标有上升趋势,应加强对清泉寺水源地的防护,进一步加强对出境断面的污染治理。 相似文献
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城镇化是推动我国经济社会发展的重要动力,在高速发展的同时,带来大量污染排放,威胁乡村环境质量与可持续发展。在对乡村生态环境问题剖析的基础上,从战略、实施、方式等层面探索解决思路,围绕科学规划、发展方式、基础建设、管理机制、宣传教育等方面分析关键点,加强乡村环境保护,保障城镇化建设健康发展,为促进农村农业持续发展提供持久动力。 相似文献
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Trametes versicolor decolorized 2000 mg L(-1) of the mono-azo substituted naphthalenic dye Amaranth with no dye sorption observed visually. The changes in the toxicity were assessed over a period of 30 d for the dye-treated viable culture, control (no dye added), and a boiled culture treated with dye, using the Microtox Acute Toxicity assay. Before dye addition, the culture filtrate had some toxicity, which increased after the dye addition. The toxicity of the dye-treated culture decreased during the treatment. The loss of toxicity occurred at the same time, with the loss of color suggesting that detoxification is associated with decoloration. The change in pH was due to natural metabolic processes and had a small effect on detoxification. Because the toxicity of the treatment was similar to that of the control at the end of the treatment, the effluent seems to be safe for release into the environment, potentially rendering this treatment suitable for industrial application. 相似文献
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泵站树状给水管网流量具有随机性,而这种随机性变化会直接影响管网的建设费用和动力费用.针对这-特点,应用随机规划原理,建立泵站树状给水管网机会约束模型,编写基于随机模拟的遗传算法程序求解该模型.机会约束模型能较客观地反映该管网的实际工况,使优化设计结果更符合实际. 相似文献
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Günay Kocasoy 《Environmental management》1989,13(4):469-475
The increase in the number of tourists visiting a coast is desired by most of the countries for economic reasons. However, this increase in tourism may cause pollution of the sea. This can be only avoided by proper planning and by predicting the carrying capacity of the coast in terms of sea pollution. This is especially important for developing countries where part of the wastewater is discharged without any treatment into the sea.In the present study the beaches were classified according to their use — and consequently the amount of waste discharged into the sea — into four groups: (1) coasts that are used only for swimming and recreational purposes; (2) coasts used simultaneously for dwelling, swimming, and recreational purposes; (3) coasts along which only dwellings exist; and (4) natural and man-made harbors, i.e., coasts used as shelters. During the survey,40,320 observations were made between December 1985 and February 1988 to determine the effect of the number of tourists on seawater quality. The results obtained were analyzed by a multilinear regression program to obtain an empirical equation giving the extent of the sea pollution in terms of coliform concentration as a function of population density and some other environmental factors.The equations derived in this study enable the determination of the carrying capacity of a beach in terms of pollution as well as the expected degree of pollution corresponding to a given population density. Furthermore, it allows the prediction of the extra carrying capacity that can be obtained by improving the waste-disposal conditions. 相似文献
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阐释了信息产业专门化街区的内涵,结合对合肥市黄山路信息产业专门化街区构成要素的分类及其邻近度的分析,分别从空间结构演化、景观演化、功能演化三方面阐述了合肥市黄山路由"电子一条街"向"信息产业专门化街区"的总体演化阶段,探讨了信息产业专门化街区的未来发展趋势。 相似文献
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